Chain grate



NbvL 20, 1928.

J, VAN BRUNT CHAIN GR'ATE Filed July 19, 1923 fi Zw/ INVENTOR ATTORNEYS Patented Nov. 20, 1928.

sazgssis ,iii-UNIIED;STATESFRAIENTQEOF EICE.

I "JOHN. van- Baum, tor; BUSHING, NEW roan, assreuoa TO magma. ENGINEER- ..-.mecompanion, QFNEWYQR LN.

Y., ,A con-roanrrou for NEWYQRK. r

. 3' HAIN- G mme.

= Application filed-J'ui 19 1 7 -My invention relates particularly totur-L naces of the type in-which thefuel supporting "grate comprises an endless belt or-ch'ain that -extends longitudinally of the fire box oi. the i furnace, the fuel being supported upon the.

surface'thereot to supportcoinbiiistion, and 12 tOWDZLlDt-HlII-tllfi-COIHPOHGHtPflI'tS thereof at *sufliciently low 'teniperature to preventnqury V "thereto and toprevent the formation o'l i clinkcrsthereon! To provide for this, air

spaces or openings are provided between adja'centsidesand-ends o-E theiinks orrother 'fuelsupporting"members of the grate air being supplied to the space between the "runs liable to work or si'l'tidownwardly through panying d'rawingsfin.which,-- r "Figure -1 1sa sectionallevation ot a porierredform; I

of the grate to' 'cnable'it to pass upwardlythrough said air-spaces oropenings in the upper'run t'o the fuel. In the operation of such grates, however,'as heretofore constructed, it lias been found that fuel and ashes are i said spaces oropenings intheupperrun of the chain; which 1s-ob ect1onable: because of r the loss otfue'l 'an'd thedifiicultyoi removing the ashes that drop down into the space tween the runs of the grate. The principal object of the present inven= tion is toovercome the disadvantages above described of theprior'constructions taining all of the advantages.

The following isa-description of'myi in- VentlOIL.IQfQI'CIlCG bGIDg -lHKl to the 3600111 5 whil e re tion of achain grate, the :linksbeing: shown in elevationand the :pivotal connections oi the links being shown in section, embodying the features of the invention in their pre Fig. 2 is a similar view of another portionv oi the grate showing particularly the links of the grate that are engaged by the sprocket teeth of the driving drum forthegrate, a sprocket tooth being shown in section;

Fig. 3 is a plan View of a portion of the upper run of the grate; and

Fi s. 4 and 5 are sectional views taken on the lines H and 55 of Figs. 1 and 2, respectively.

The chain grate illustrated in the drawings is provided With rows of links 2 and 4 that are alternately arranged, the links of each row being arranged end to end and the links of 1923; Serial no. 652 514.

the several'rows being arranged instaggered relation withztheirv ends pivotally connected by pivot p1ns6 extendingthrou'gh hubs '8 on oppositesides oi each'link. Gertainof'the' links 2 are provided with recesses or sockets '10 (Figs. 2-and 5) betweenthe'hubsthereof for receiving the teeth of the' usual sprocket wheel or drum llovei which'the' grate passes, the ends of thelinks arranged bet veen said recessed links 2beins1cutaway at .12 :soE-tas to clear the sprocket teeth. :The several links are provided with substantially flat: fuel supporting surfaces 14.

. In the con struction? illustrated in the drawings, each of the links-4: iswsuitably recessed or undercut on opposite sidesethereo f to form 'i'uel supporting flanges 16' extending from end to end thereof. Each ofthe-links 2 is provided, on opposite sides thereof, with suitable-flanges 18 extending longitudinally thereof having their ends "curved concentri'callyiwiththe axes of the pivot pins 6/ Thei flanges 18 are spaced a suitable distance from the fuel supporting' surface of the link so that when the links are assembled they extend beneath the tlangestlfi cit theaadjacent links 4-; the: portions 20 of-the flanges 16 th at are arrangeddirectly abovet-he curved ends of theflanges l8 beingcurved concentrically with these curved ends. The top surfaces of the flanges+18 arespacedia slight distance beneaththe flanges 16 and the longitudinal os 18 are spaced a slight edges of these :tlan

distance troin thead-jacent portions of. the

.- links 4. i Theiflanges 16 are each provided. L wlth a pluralityof vertical channels 22. The

forward-end oi each otthe links of each row 1s-.-prov1ded' with a forward projectionor tongue 24: having its top surface forming a continuation of the fuel supporting surface of the links and each projection 24 extends into a transverse recess 26 in the rear end of the next succeeding link. The adjacent ends of the links are spaced a slight distance apart and the projections 2t'are spaced a slight disinc tance from both the vertical and horizontal walls ofthe recesses 26.

With this construction it will be apparent that a free air supply is provided to the fuel and 18 will eifectively prevent the sifting of 110 supporting surface of the grate through the 5 fine particles of fuel and ashes between the sides of adjacent "links, and the projections 24 will effectively prevent the sifting of fuel.

and ashes downwardly between adjacent ends of the links. "Thecurved ends of the flames 18 and the curved lower surfaces 20'of t he flanges 16 enable the relationship of these flanges to be maintained while their links are assing over the supporting and driving ruIns or sprocket wheels of the grate.

. At various points on the surfaces of the links slautingrecesses 27 are provided so as to retain ashesfroni the burning fuel. These recesses extend only partly across the links and have their open ends removed from. the channels 22 so as not to discharge therein.

. As will be evident to those skilled in the art my invention permits of various modifications without departing from the spirit thereof or the scope of the appended claims.

What I claim is:

1. A chain grate comprising a plurality of rows of links, the links 'of each row being arranged end to end, the links of the several rows being arranged side by side in staggered relation with their ends pivotally connected, and adjacent links of adjacent rows having one a flange extending longitudinally there of and the other a recess for receiving the flange, each flange extending substantially the length of the link and spaced a distance below the fuel supporting surface of the link throughout its length, and each link of alternate rows having one such flange on each side thereof, and each link of the other rows having one such recess on each side thereof.

2. A chain grate comprising a plurality of rows of links, the links of each row being arranged end to end, the links of theseveral rows being arranged side by side in staggered relation with their ends pivotally connected, and adjacent links of adjacent rows having one flange extendinglongitudinally thereof and the other a recess for receiving the flange,

the flange being spaced from the Wall of the recess so as to enable air to pass upwardly between the flange and said wall, each of the links of alternate rows having one such flange on each side thereof and each of the links of the other rows hav ng one such recess on each side thereof.

. ccsses curved ends of sai A chain grate comprising a plurality of rows of links, the links of; each row being arranged end to end, the links of the several rows being arranged side by side in staggered 4. A chain grate comprising a plurality of rows of links, the links of each row being arranged end to end and the links of the several rows being arranged side by side in staggered relation, adjacent links of adjacent rows having one a flange extending longitudinally thereof with the ends of the flange curved about the axes of its pivotal connections respectively, and the other having a recess for receiving the flange, with the flangespaced from the wall of the recess so as to enable air to pass upwardly between them, and each of the links of alternate rows having one such flange on each side thereof, and each of the links of the other rows having one'such recess on each side thereof.

5. A chain grate comprising a plurality of tical channels leading from said space between the flanges to the fuel supporting surfaces of the links, each of the linksof alternate rows having one such flange on each side thereof and each of the links of the other rows having one such recess in each side thereof.

JOHN VAN BRUNT. 

